# 链式赋值
a = b = 10
print(f'a = {a}')
print(f'b = {b}')

# 多元赋值
a, b = 10, 20
print(f'a = {a}')
print(f'b = {b}')

# 交换两个数字
a, b = b, a
print(f'a = {a}')
print(f'b = {b}')
